Systems and methods for improving the performance of a quantum processor to reduce intrinsic/control errors

Abstract

Techniques for improving the performance of a quantum processor are described. Some techniques employ reducing intrinsic/control errors by using quantum processor-wide problems specifically crafted to reveal errors so that corrections may be applied. Corrections may be applied to physical qubits, logical qubits, and couplers so that problems may be solved using quantum processors with greater accuracy.

Description

BACKGROUND[0001]Field[0002]This disclosure generally relates to computationally solving problems.[0003]Solvers[0004]A solver is a mathematical-based set of instructions executed via hardware that is designed to solve mathematical problems. Some solvers are general purpose solvers, designed to solve a wide type or class of problems. Other solvers are designed to solve specific types or classes of problems. A non-limiting exemplary set of types or classes of problems includes: linear and non-linear equations, systems of linear equations, non-linear systems, systems of polynomial equations, linear and non-linear optimization problems, systems of ordinary differential equations, satisfiability problems, logic problems, constraint satisfaction problems, shortest path or traveling salesperson problems, minimum spanning tree problems, and search problems.[0005]There are numerous solvers available, most of which are designed to execute on classical computing hardware, that is computing hard...

AI Technical Summary

Benefits of technology

[0022]A computational system may be summarized as including at least one quantum processor comprising a plurality of qubits and a plurality of couplers, each of the plurality of qubits having a respective controllable local bias term and each of the plurality of couplers having a respective controllable coupling term; at least one processor-based device communicatively coupled to the at least one quantum processor; and at least one non-transitory processor-readable storage medium communicatively coupled to the at least one processor-based device and that stores at least one of processor-executable instructions or data, where in use the at least one processor-based device: causes the at least one quantum processor to set each of the coupling terms to a first calibrated zero value; causes the at least one quantum processor to set each of the local bias terms to a target value

Problems solved by technology

However, the final low-energy state may not be the global energy minimum.

These hardware elements are subject to practical constraints, both in design and fabrication that ultimately l

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